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In this paper, in order to realize high voltage static switches of voltage source inverters in high power applications, two series connected 4.5kV rate Si-IEGT with SiC-PiN diode pairs (hybrid combination) are considered with hard switching method. The switching test of power module that is hybrid combination is carried out under 5kV DC bias voltage. The gate driver circuit is designed by high output...
This paper presents an easy way to achieve soft switching in the chopper circuit. A near zero voltage switching is realized by adding an simple auxiliary resonant branch to a given chopper circuit. The turn off loss is reduced by connecting snubber capacitors in across the main switches. The design which is carried out is to realize ZVS at the rated load and near ZVS under all other load conditions...
This paper proposes a novel soft-switching interleaved boost converter composed of two shunted elementary boost conversion units and an auxiliary inductor. This converter is able to turn on both the active power switches at zero voltage to reduce their switching losses and evidently raise the conversion efficiency. Since the two parallel-operated elementary boost units are identical, operation analysis...
A circuit configuration of a single phase non-isolated on-line uninterruptible power supply (UPS) with 110 V/220 V input output voltage rating is proposed, allowing the bypass operation even if the input voltage is different of the output voltage. The converter consists of an AC-DC/DC-DC three level boost converter combined with a double half bridge inverter. In this type of configuration, size, cost...
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